14. a house-painting company charges 376$ plus 12$ an hour. another painting company charges 280$ plus 15$ an hour. a. how long for which both companies will charge the same amount? b. what will the cost be?

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐